Which of the following statements about the ef1ze y 3 e4qq rl-k0ciexa:cij/l- ;fqwt9h 95jfect of surface area and volume on the cell’s processefrlkty3el99eqc 4qj :;hi- ez-1x iqwc j/5a0s is false?

  Which statement best describes stem cel57yd az e6l6b; aq)kglls?

  Which is a correct description of the cell type adapted for gas exchange in t (2;gas: nbuovhe lung:as(n2 u gbo;vs?

  Which of the following explains the limitatio*r k1 ww0qwa1qgx;p:aov a+pcg63d i,dc o)3 rns on cell size?

  What is this cell's most likely primary function, and where f5 +pt.sng8(acmtw j,u)au5 xcould it be located in a mammalsm p.nu8)+u a,tj xw5c5af gt(?

  Which of the following characteristicfd a5 6cusg9u wu;ci8en ,6pp:s of type I pneumocytes contribute to increasing th f5w 9cpanpe ciuu;6:6g,sud8 e rate of gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a e 7sp) ;k;2d8fqliqnjbone marrow transplant from a 36 year old. One of the functions of these cells isfpl )q2ej;q8i; k s7dn to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and stria ro+0; vloojr2u1yob7pkg1+i ted muscle fi0puyb o; kjir+oo l7 r11v+2gobres?

Below is a diagram of a motor neuron. Nw7 :e8gk m:xr7)e dxkheurons are the longest cells in the human b ew7xd :8 gemh)x:r7kkody.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respiratory distress syndromeqgg 4 l z uc7-i87-dydowii41x, which could be caused by a lack of sufficient surfactant in the pu- ig7qc g4d diiy4ox 1w8l7zu-lmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryo6kbj27 k iayk wai/yo7-e78agnic stem cells are not used in the treatment of l 7oiyjabaw8k6i y/ e27kgka7- eukaemia?

  The table shows the diameters of red blood cells 2f3n u x5 t(jfpo/uxo+from different organisms. Which red blood cell will have the highest surface area to volume ratio?5u ux 3jt2+ fxn(/pfoo

1.Explain how the shape of erythrocytetyzo2) tik5*poihc(1 s and cells lining the proximal convoluted tubule make these cells more adapted to th)kpohtz y(*tici15o 2e functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem cells and specialised c id,m3rjb:xt g;),mhs 6 s7ccyells is/are not true?icx:3,bhs,c6sjmyd) m7rt g;

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the hg*gh471a8bt bosnw6following is the correct order from smallest to largest? o4*bhg1wsh67 bga nt8

  Which row in the following table gives the correct disadvantag+m,w 2ddti/ vv ,jxxt8es of the different stem cell sources for therape v xidtj 2,m+d/tv,8wxutic uses?

1.Describe how the use of ste, j+edu:ak2 y2dhb1d 3frzs y+m cells may be used to treat type I diabetes in the fdb rf221k s+,y:zu3 yjdahde+uture.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised cells (not tvm+feg ba0s6 iy -p5 z72ngjtpq(7rb.o scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.